On Wed, Aug 30, 2023 at 05:56:14PM +0530, Srikar Dronamraju wrote: > Currently there are four powerpc specific sched topologies. These are > all statically defined. However not all these topologies are used by > all powerpc systems. > > To avoid unnecessary degenerations by the scheduler , masks and flags > are compared. However if the sched topologies are build dynamically then > the code is simpler and there are greater chances of avoiding > degenerations. > > Even x86 builds its sched topologies dynamically and new changes are > very similar to the way x86 is building its topologies.
You're not stating it explicitly, but you're doing this as a performance optimization, right? The x86 thing didn't particularly care about avoiding degenerate topologies -- it's just that the fixed tables method grew unwieldy due to combinatorics. And how does this patch relate to the other series touching this? powerpc/smp: Shared processor sched optimizations